Gasket.



e. M..SHAFFEB & E. A. FRANKLIN.

GA SKETL APPLICATION FILED IULY 9. I913.

Patented Mar. 7,1916.

IN VEN T 0R5 'W/TNESTSES short time, especially -side diameter substantially ner diameter'of the annulus and forming a companying drawings,

remainreduced in inside or nnnvna,

AND A. FRAI Q'KLIN, 10F FORT MORGAN,

,OFFIC conona'no.

GASET.

for its objects theproduction of such a dev1ce WhlChiWill; make atight joint between.

the parts to'be connected, which will withstand heavyipressure, and which will have a smooth,rigid and unbroken interiorsurface of great strength. a v The ga ket-is designed for, and particularly applicableto, the joints between the plates of 'filter presses and other apparatus using such-joints. In such structures yie ing or resilientgaskets made of rubber or other suitable "material are employed, such gaskets closing or expanding toward the center when compressed on the sides in making a joint. It has been found that in a when the apparatus is used in the-presence of heat, or hot liquid is pressedthrough the joint, the gasket will diameter and will no longer"i nake a close joint between the adjacent s rfaces, so placed.

In carrying-our invention into effect we provide a resilient annulus gasket, prefer-- ably having a cylindrical constant inside. diameter,

strengthning ring or band and an inner having an outequal to the incontinuous'and. rigid support for the annulus when compressed. These and further details will more fully appear hereinafter.

The inventionconslsts in the novel construction and arrangement of parts hereinafter described, and illustrated in the ac- "in which- Figure'l is aside view in elevation of the gasket; Fig. '2 is an edge view, partly in section"on-line-2-2 of Fig. 1; Fig. 3 is a view similar to Fig. 2, but showing the gasket compressed; and Fig; 4 is a side view of a portion of a filter press plate with the gasket in position.- Referring; tothe drawings, 10 is a resilient annulus orring adapted o fit between Specification of Letters Patent.

in the that it must be re- Y inner surface or .provlded which be made in details of Patented Mar. 7, 1916.

Application filed July 9, 19 1 8. Serial Nb. 778,048.

the'parts to be jo' ed and having an inner cyl ndrical surface 11 throughout its width. ThlS surface is spoken of, and shown, as

cylindrical in this instance vfor the reason 7 that the gasket is'circular, but this is merely illustrative as/the gasket may have any other shape; The main consideration is that the inner surface of the part -10 is longitudinally straight. V

Fitting within annulus 10' is ring 12 of rigid material which is continuous or otherwise made rigid against inward re'ssure when the 'gasket is compressed. T 's ring 12 has an inner diameter-and surface which is unchanged by the pressure gasket, and an-outer diameter and surface substantially the same as the'inner diameter of resilient annulus 10, so that it may be readily slipped within the latter. is made of less widththan'annulus 10, and is preferably spaced from each side or face thereof so as not to be engaged by the parts to be joined and to permit annulus 10 to be compressed. When'compressed the inner surface of the annulus will expand inat 13 in Fig. 3, thus holding the ring in place. By this construction it .will be seen that ring '12 takes mostof the inward almost any pressure, and

be compressed inward to some extent, does not lessen the inner diameter of the gasket as a whole. A smooth inner surface is thus will not obstruct the flow of liquid, and the gasketIc'annot-be given a permanent enlarged inner diameter.

In Fig. 4 our improved gasket is shown applied to the plate 14 of a filter press. By this arrangement an efiicient joint is efr fected. I

We a're'aware that various changes may construction" without departing from the invention, we aim to cover within the scope of the appended claims.

Having described ourinvention, what we claim as new and desire tosecure by Letters Patent of the United States, is

1. A gasket comprising an outer compressible annulus having an inner c lindrical surface throughout its width, and'a ring of rigid unyielding material of less width than the annulus, said ring ha mg an 'alter put upon the and all such Ring 12 wardly upon each side of ring 12, as shown cylindrical surface of the same diameter as said inner cylindrical surface of the annulus and spaced from each side thereof,

whereby in use said ring prevents the inward distortion of the body of said annulus and the inner edges of said annulusare compressed on the edges of the ring and prevent displacement of the'latter;

2. A gasket comprising an outer resilient annulus having an inner cylindrical surface throughoflt its width, a continuous unbroken ring of rigid unyielding-material of less width than the annulus, said ring having an outer cylindrical surface of practically the same diameter as said inner cylindrical surface of the annulus and fitting within the same between and spaced from 1 the outer faces thereof whereby when the gasket is compressed by heavy pressure the signatures in presence of two witnesses.

GEORGE M. SHAFFER. EMLEN A. FRANKLIN.

Witnesses:

S. P. SAUNDERS, W. D. LIPPI'IT. 

